Drink mixer



June 17, 1930. v s. JQ oPLAwsKl DRINK MIXER 5 Sheets-Sheet 1 Filed July 5, 1925 7 June 17, 1930. I 's'. J. Po LAwsKi 1,765,095

DRI NK MIXER Filed Jui 3, 1925 s Sheets-Sheet 2 June 17, 1930. v 5. J. POPLAWSKI.- I 1,755,095 DRINKMIF-XER v Filed July 5, 1 92s "a Sheei-Sheet s" ji /6w; I

LOW, m, a cum. I flu, W+

Patented June 17, 1 930 UNITED STATES PATENT OFFICE srnrnnx .1.

COMPANY, OF RACINE, WISCONSIN, A.

rorulwsxr, or moms, Wisconsin, Assmnon :ro ARNOLD nLEc'rmc CORPORATION OF WISCONSIN nnmx MIXER Application filed July 3,

My invention relates to mixers such as are used to commingle the ingredients of beverages sold at soda fountains, and 1s concerned with the provision of certam 1mrovements-applicable to drink mlxers emodying the generic invention disclosed in Patent No. 1,529,830, granted to Russell A. Blish and me on March 17th, 1925.

In the Blish and Poplawski patent aforesaid is disclosed a drink mixer comprism rinsing or use.

Generally speaking, my present invention provides a drlnk mixer possessin the generic characteristics mentioned in t e preceding paragraph and is otherwise characterized as follows:

(a) The switching circuit are located within the motor housing and are operated when the container-a 'tator unit is manipulated into and out o cooperative relation with the supporting and driving unit;

(b) The motor comprises a'yielding element which performs two important functions, viz: it acts yieldingly to clamp the container-agitator unit between the motor and the receptacle support and also acts to transmit movement from the container agi- 'tator unit to the motor switch devices to operate the latter; Y Y

(c) The clutch members which afiord the detachable driving connection between, the

motor and the agltator are of a novel construction permitting their connection and disconnection to be accomplished in a facile and silent manner, and affording the characteristic of a universal joint;

(01) The said clutch members are so constructed that the rotation of the motor shaft devices for the motor 1925. Serial 1%. 41,241.

may be utilized to facilitate interengagement of the clutch members;

(6) The agitator is so constructed that the upper bearing for its use is silent, self-cleaning and practically frictionless when the shaft isbeing driven by the motor;

) In one embodiment the agitator is so constructed that the lower stirring element can be readily removed from the agitator shaft for ready substitution by larger or smaller stirrin elements;

(g) In this latter embodiment the agitator shaft is separable into two parts for permitting the removal of the lower stirring element, and this divisibility ofthe shaft is utilized to provlde a relatively simple thrush--- bearing support for the shaft.

Other features, objects and advantagesof my invention will appear from the following detailed description wherein reference is made to the accompany-mgdrawings.in whichz.

Figure 1 isa side view-partly'in elevation and partly in section of adrink-1nixer-em- 'bodymg my invention;

Fi of the agitator taken on Figures 3 and 4- are views taken on 4 1 respectively of FigureZ;

a larger scale;

Figures 5 and 6 are end elevational andlongitudinal sectionalviews' respectively of the female clutch element, showing the lat ter in one of the initial steps involved in the manufacture of this element Figures 7 and 8 are similar views showing the same element after the center has beendrilled out;

- Figure 9 is a horizontal sectional view taken approximately on the plane of the line 99 of Figure 1 and showing the switch-- ing" mechanism Figure 10 imately on Figure 9;

Figure 11 is a detail sectional view taken on the plane-of the line 11-11 of Figure 10; Figure .12 is a view enerally" similar to Figure 1, showing a modified form-of switching mechanism;

gure 2 is a longitudinal 'sectional view transverse sectional the planes of lines 3-3 and 7 is. a sectional view taken approX- Y the plane of the line 10.10 of proved construction of switching mechanism for the motor- The armature shaft of this motor indicated at 25, extends downwardly and at its lower end sup orts a clutch element 26 which is adapts to eiiect driving engagement with a cooperating clutch element 27 comprising part of the container agitator unit 28. I shall describe this container-agitator unit after explainingthe construction of the switch mechanism embodied in the motor head 21.

Reciprocally supported about the driving clutch element 26 is a sleeve 31 which normall extends down below the end of the drivmg clutch element and is adapted to be engaged by a portion of the eontamenagitas tor unit when the latter is laced in o erative position below the motor ead 21. he two sleeves are relatively rotatable, it being 1ntended that the sleeve 31 have reciprocatory 'movement while the sleeve 26 will be rotated with the armature shaft 25at a relativel When thesleeve high speed. The reciprocating sleeve 31 is provided with an angular shoulder --32 in which is formed an annular groove 33. ,En- 'ga ed in the annular groove 33 "is the offset end. of a vertically reciprocating stem 34.

which is the operating element for the switching mechanism located within the motor housin 22. The reciprocating sleeve 31 and the switch operating element 34 are enclosed in a tubular housing extension 35 which is detachably secured-to the mam housing 22 by screws 36. The reciprocatory sleeve 31 is prevented from being displaced from the lower end of the clutch element 26 by the abutment of the collar 32 against the bottom wall of the housing portion 35.

Referring now to Figures 9 and 10, the reciprocating stem 34 passes up through an opening 37 in the motor housing 22, where 1t engages the underside of a forked lever 38. This lever is forked to accommodate the central bearing boss 39 for the motor shaft and the lubricant duct 41 which extends inwardly to this hearing boss from the outside of the motor housing. The two extensions 38 of this forked lever'have'pivotal support on 'bosses42 extending upwardly from the bottom part of the motor housing 22. Screws 43 pass down through relatively large apertures in these extensions 38' the slot 48. Fastened by porting bracket 49 are lever 38 raises and tap into the bosses 42. Springs '44 confined between the heads of the screws 43 and the extensions 38 of this forked lever tend to rock this lever down to the full line position illustrated in Figure 10 which position corresponds to'the open (position of the switch. It will be observe that the spring mountings of the forked extensions 38 ofthe lever on the bosses 42 afford relatively simple and inexpensivepivot supports w ich serve to move the lever and switch to open position.

Adjacent the point where the lever 38 is engaged by the reciprocatorystem 34 an extending ton ue portlon 38'' extends upwardly for a'ttac ment to a reci rocatory switching element 46. This switc element or contactor comprises a fiat strip of insulation of end of this contactor plays in a slot 48 formed in a three sided bracket or housing 49 composed of insulation. This bracket member is secured to the motor housing 22 by screws (not shown) with a sheet of insulation 51 interposed between the bracket member 49 and the housing 22 to insulate the other wall of screws 52tothe opof this contact suptwo contact clips 53 series in the motor The contactor 55,

posite side portions 49' which are connected in circuit by conductors 54. consisting of a stri of sheet metal, is rigidly vstamped around t e stri of insulation 46. 31 is'ralsed by the placing of the container-agitator unit 28 on the stand 19 the resultant raising of the stem 34 and contactor element 55 into. engagement between the contacting clips 53-53, thus closing the motorcircuit. The pressure of the two springs 44-44 is effective to move the contactor 46 downwardly and open the motor circuit when the container-agitator is removed. 7 I

Having thus described the particular features of the supporting and driving unit, I now direct attention to the improved container-agitator unit, and to the clutch mechanism for connecting the agitator shaft to the motor shaft 25.

The container-agitator unit 28 comprises a receptacle or cup 57 which is preferably of metal and which is open at the top. This receptacle is adapted to rest upon a short pin or lug 58 which protrudes from the side of the standard 19, being secured thereto in any suitable manner. The alignment of the agitator shaft, and of the upper bearing thereof, with the clutch element 26 and the sleeve 31 assists in holding the receptacle 57 in vergicalg balanced position on the stud or shoul- Attached to one side of the receptacle 57 is the supporting frame 61 for the agitator shaft 62. This supporting frame may be secured to the receptacle 57 in any desired manner, but, as described in the aforesaid Patent 1,529,830, this frame is preferably removable from the receptacle so that it can be cleaned se arately from the receptacle, --or so that rea y access can be had to the stirring elements and to the lower end of the agitator shaft. In making'this support 61 removable the upper end thereof is provided with an outwardly and downwardly extending finger 63 between which and-the body of the support 61 the upper edge of the receptacle is adapted.

snugly to be received; The finger 63 may very conveniently be formed by stamping it out of the body of the support 61. The upper end of support 61 is provided with a laterally extending flange 64 within which is secured the sleeve or collar 65 provided with an 0 enh which the upper end 0 the agitator shat 62 extends. The upper surface of the collar 65 is tapered so as to center itself in thespring pressed sleeve 31 and so as snugly to engage the end of this sleeve. The lower end of the supporting frame 61 has a laterally extending flange 68 to which are secured spaced bearing members;69 and 71. These twobearing members preferably are mounted on the flange 68 so as to be readtherefrom such as by the bolt 72. Thelower end of the agitator shaft 62 has a tapered point 73 which bears upon the upper surface of the lower bearing member I the agitator sha 71, Min a recess formed in the surface of this'bearing member. This point of bearing contact carries the down thrust of the agitator shaft 62. Directl above this tapered end 73 is reduced, as indicated at 74, this reduced portion passing through a bored aperture in the upper bearing member 69. The upper surface of the conical end 73 forms a thrust shoulder 75 which bears against the underside of the upper bearing member 69 and carries the upwardly acting end thrust created by the stirring members on the agitator shaft.

. The two stirring elements 7 6-7 6 are secured to the agitator shaft 72 directly above its lower end, these stirring elements comprising discs which are punched out with inclined vanes. These two stirring elements may be of the same size or of different sizes. The upperend of the agitator shaft 62 has lateral play in the collar 65, and mounted on th1s upper end is the female clutch element 27 comprising one part of the clutch 26-1-27. This clutch is of unique construction to the end of adapting it to the particular requirements of the present device. For example, it affords a drive between the motor shaft 25 and'the agitator shaft which is positive at all times. It permits of the facile insertion of one clutch element within the other in the act of placing the container-agitator unit in position on the support 58, during which placing in alignment will not .tric motor.

the axis of the agitator shaft is often inclined sharply to the axis of the motor shaft. This clutch is also operative tov a certain extent as a universal joint so that small errors affect the driving relation, and the act of replacing or removing the container which often places the two shafts considerably out of alignment momentarily with the motor running, will not stall the motor or injure the parts.

The female socket clutch element 26 is constructed substantially as shown in Figures 5 to 8 inclusive. A cylindrical blank is first formed with a plurality of equi-distantly' spaced holes 78 extending into the end of the blank and arranged concentrically of the axis of the blank, see Figures 5 and 6. This end of the cylindrical blank is then drilled out to the. depth of these holes on a diameter indicated at 79. The result is a cylindrical bore 79 which is internally fluted or grooved at 78, an even number of these holes 78 being drilled in the end of the blank so that these flutes 7 8 will be at diametrically opposite points in the bore. A second bore 81 is extended through to the other end of the blank for receiving the armature shaft 25 of the elec- A set screw 82 is tapped laterally into this bore 81 for securing the clutch element on the motor shaft. I

The male clutch element comprises a sub-- stantially s herical head 27 which is suitably secured to-t e upper end of the agitator shaft 62. This spherical head has a snug'sliding fit in the bore 79 of the socket clutch member, this male clutch member being of larger diameter than the agitator shaft 62 so as to permit tilting movement of the ball 27 in the bore 79. A pin is passed diametrically through the ball 27 and at its ends is headed werto form small projecting knobs 84--which take into the longitudinally extending flutes or grooves 78 in the bore 79.

The rounded upper end of the ball 27 enables this clutch element to center itself'readily in swinging the two clutch elements into engagement, and the close proximity of the grooves 78 and the rounded form of the knobs or rojections 84 enables these projections rea ily to align themselves with these grooveswlt will also be apparent that the ball 27 will have a, limited universal joint movement in the socket 26. The tilting of the ball on an axis passing through the two knobs or driving projections 84 merely rotates these projectionson their axes in the grooves or recesses 78, and the tilting of the ball on an axis transverse thereto merely raises one knob and lowers the other in the grooves 78.

In placing the container-agitator unit in operative position on the machine the ball member 27 is merely inserted at the lower end of the sleeve 31, the container-agitator unit is then raised, and the bottom of the unitlis thenswung in upon the'supportin'g knob 58. The act of thrusting the unit u wardly into clutch engagement raises t e sleeve 31 and closes the motor circuit, as before described. The pressure ofthe springs 44 acting downwardly through the sleeve 81 is borne u on the tapered collar.65 and serves to hold t e container-agitator unit in firm engagement on its supportmg knob 58 against any vibration or rattling of the parts. If desired, the pressure of the sprmgs 44, may be supplemented by a helical spring 86 coiled-about the socket clutch member 26 and bearing against the upper end of the reciprocable sleeve 31. The standard 19 may be formed with lon itudinally extending ribs 87, spaced laterzilly from the su porting knob 58 for preventing lateral disp acement of the lower end of the container-agitator unit when mounted on the standard.

In Figure 12 I have illustrated a slightly different embodiment employin a mo ified form of switching mechanism. 11 this form the supporting knob or shoulder 58 is secured to a swinging arm 88 which is pivotedat 89 within the standard 19. This lvoted assembly is free to swing in a slot 9 in the standard 19. A lug 92 depends from the knob 58 inposition to engage an insulating button 93 WhlCl'l is secured to a leaf spring 94. T1118 leaf spring carries a contact 95 which is adapted to engage a contact 96 on a second leaf spring 97. These two leaf'springs are anchored between a pair of supporting lates 98-and 99 by screws 101, these springs insulated from each other and from the plates 9899 by insulation 102. The supporting plate 99 is formed with'one or two extensions 99' on which is carried the pivot pin 89. The knob 58, the swingin arm 88 and the contact springs are thus al embodied in a single unitary structure. This unit is suitably attached in the standard 19, as by screws,

so that it can be readily removed therefrom and inserted therein as a unit assembly. The

two leaf springs 94 and 97 are included in .series inthe motor circuit, and it will be obvious that the weight of the container-agi tatorunit 28, when resting on the knob 58 will be effective to thrust the spring 94 over into circuit closing engagement with the contact spring 97. In this embodiment the reciprocatory sleeve 31 is retained, together with its coil spring 86, the pressure of this spring thrusting the sleeve down against the tapered collar and yieldingly holding the container-agitator unit in operative position,

against vibration or displacement from theknob 58.

In the modification shown in Figures 13 and 14 the agitator device is separable into two parts whereby the agitator readily can be assembled or disassembled, and whereby larger or small sizes of stirring elements can be substituted at the lower end of the agiing frame 61 of Figure 2 has eing.

tator shaft. The main shaft ortion 62", on i which the upper stirring e ement 103 is mounted, hasa reduced screw threaded extension 104 projectmg from its lowerend.

The on s of the shaftportions 62 and 62 form angular shoulders 107 and 108 which are, maintained in spaced relation when the two shaft sections are screwed together, these shoulders being utilized as thrust bearing surfaces. The supporting frame 61', whic is substantially i entical with the supporta laterally extending flange or arm 109 at its lower end which carries a bearing bushing 111. This bearing bushing engages over the upper unthreaded portion of the reduced extension 104, and the engagement Qf the shoulders 107 and 108 with the upper and lower sides of this bearing bushing constitutes a simple and efiective thrust bearing forcarrying both the upward and downward thrusts of the agitator device. This embodiment of containeragitator unit is receivable on the standard 19 ofeither embodiment shown in Figure 1 or Figure 12. The ready removability of the lower stirring element 106 enables larger or smaller stirring elements tobe substituted at this end of the agitator shaft, which is often desired.

While I have illustrated and described these certain preferred embodiments of my invention, I contemplate that any changes and departures may be made therefrom without departing from the spirit and scope of my invention as defined by the appended claims. I contemplate that many phases of my invention need not be combined agitator-container unit.

I claim 1. In a drink mixer, a standard, an electric motor supported on said standard and having a downwardly extending shaft, a receptacle, an agitator, a switch for said motor, and an actuating member for said concerned with the switch mounted concentrically of said shaft said standard, an electric motor in said housing having a downwardly extending motor shaft, 9. coupling member on said motor shaft, a sleeve concentric of said coupling member, a lever pivoted in said housing, a stationary contact in said housing, a movable contact operatively connected to said lever for moving into and out of engagement with said stationary contact under the actuation of said sleeve, said contacts being included in the motor circuit, and a container-agitator unit adapted to be operatively coupled to a coupling member on said motorshaft, said container-agitator unit comprising a surface adapted to engage and raise said sleeve in the coupling of said unit to the coupling member on said motor shaft.

,4. In a drink mixer, a standard, a housing carried at the upper end of said standard, an electric motor in said housing, a stationary contact in said housin a lever supported in said housing, a mova le contact co-operating with said lever and adapted to engage said stationary contact, said contacts being included in the circuit of said electric motor, a sleeve concentric of the motor shaft and arranged to operate said lever, and a container adapted to be placed in operative position below said electric motor, said container comprising a surface adapted to engage and move said sleeve upwardly in the placing of V said container below said electric motor.

y 5. In a drink mixer, a standard, a housing at the upper end of said standard, an electric motor in said housing having a downward- 1y extending motor shaft, a forked lever in said housing having its forked arms. embracing the motor shaft and pivoted at their ends to said housing, a movable contact element actuated-by said lover, a stationary contact element co-operating therewith, said contact elements being included in the circuit of said electric motor, a coupling member on saidmotor. shaft, a sleeve reciprocally mounted over said coupling member, means operatively connecting said sleeve to said lever, a container-agitator unit, a coupling member on the agitator of said unit adapted to engage the coupling member on said motor shaft, and means on said containeragitator unit adapted to raise said sleeve when said coupling members are brought into operative engagement.

6. In a drink mixer, the combination of a supporting member, a motor carried thereby" and having its shaft extending down- --wardly, a container-agitator unit comprising anagitator shaft, and'clutch means for connecting said shafts comprising a socket member carried by one of semi, shafts having an internally fl'uted bore, and a substantially spherical clutch member carried by the other said shafts having a projection for engaging in the flutes of said bore.-

7. In a drink mixer, the combination of a supporting and driving unit comprisin an overhead motor and its supporting stan ard,

'a shaft extending from said motor, a container-agitator unit comprising an agitator shaft, a first clutch member on said agitator shaft, a second clutch member on said motor shaft, said first clutch member having a rounded end to permit introduction into the ,other clutch member with said shafts at an angle to each other.

8 In a drink mixer, the combination of a supporting and driving unit comprising an overhead motor and its supporting standard,

a shaft extending from said motor, a container-agitator unit comprising an agitator shaft, a clutch member on each of said shafts, one of said clutch members having a cylindrical bore and-the other said clutch members having-a rounded end surface to permit introduction thereof into said cylindrical bore when said shafts are'disposed at an angle to each other.

9. In a drink mixer,

' on adapted toengage in-the-flutes of said bore. 7

10. In a drink mixer, the combination with a supporting and driving unit comprising an overhead motor and its supporting standard, of a container-agitator unit for cooperation ther'ewith comprising an agitator shaft separable into two independent sec-' tions, a. stirring element on each of said sections, and a bearing engaging said shaft at the point of separation of said sections.

11. In a drink mixer, the combination of a supporting and driving unit comprising a fixed overhead motor, a container-agitator -unit comprising an open top container and an agitator disposed in said container and adapted to be driven by said 'motor,.said agitator comprising a shaft separable into two independent sections, shoulders on each of said sections, and a bearing for engaging both of said shoulders.

12. In 'a drink mixer, a container-agitator unit comprising an open. top receptacle, a

rotatable agitator shaft mountedtherein, an

upper stirrmg element on said shaft, a lower stirring element detachably connected to said shaft, and a bearing engaging said shaft at the point of juncture of said lower stirring element and said shaft,'

the combination of a supporting and driving unit comprising an 13. In a drink mixer, a container-agitator unit comprising an 0 en top receptacle, a rotatable agitator sha t therein comprising two separa le sections, stirring means carried by said shaft, and a thrust bearing for said shaft engaging said shaft at its point of separation.

14. In a drink mixer, a container-agitator unit comprising an open top receptacle, an agitator support comprising a member extending substantially parallel to one side of said receptacle and adjacent thereto, a finger carried by said support adapted to engage the outer side of said receptacle whereby t e edge of said receptacle is clamped between saidfinger'and said support, agitator shaft guide means extendin from sai support for guiding the upper en of said shaft, a thrust bearing extending from the lower end of said support, and stirring elements on said shaft above and below said thrust bearing.

15. In a drink mixer, a receptacle, an agitator, an agitator support comprising a member extending substantiall parallel to one side of said receptacle and a j acent thereto, a finger carried. by said support adapted to engage the outside of said receptacle whereby the edge of said/receptacle is clamped between said finger and said support, a guide for the upper end of said agitator extending from said support, a bearing for said agitator extending from the lower end of said support, said agitator com rising two separable sections, a threade extension on one of said sections screwing into a threaded socket in the other said section, shoulders at the ends of each of said sections, said bearing having thrust bearing engagement with said shoulders, and stirring elements on each of said agitator sections.

16. In a drink mixer, a hollow standard, the interior of which is accessible from the lower end, an electricmotor carried by said standard, and a combined container support and motor switch unit mounted in said hollow standard, said unit comprising a mountin member, a supporting member pivoted to sai mounting member and having a portion extending externally of said hollow standard for supporting a container, said unit also comprising a pair of electrical contacts included in the circuit of said electric motor and responsive to the pivotal movement of said supporting member, said unit consisting of said supporting member and said contacts being removable in its entirety from the lower end of said hollowstandard.

17. In a drink mixer, a container-agitator unit comprising an open top receptacle, an agitator support comprising a member extending substantially arallel to one side of said receptacle and ad acent thereto, a. finger carried by said sup ort adapted to engage the outer side of said receptacle whereby the edge of said receptacle is clamped between said finger and said so port, agitator shaft guide means extending rom the upper end of said support, oppositely facing bearing surfaces at the lower end of this agitator shaft, and two thrust bearing members extending from the lower end of said support for engaging said oppositely facing bearing surfaces.

ried by said flange, and means for detach- 1 ably securing one of said thrust bearings to said flange. 4

19. In a device of the class described, a fe-. male clutch element comprising a member having a cylindrical socket, the walls of said socket being cut away at intervals .by axial grooves of the cross-section of an arc of a circle, and a male clutch element comprising a ball adapted to fit said socket, and projections on said ball to enga e the said grooves.

20. In a device of the c ass described, a female clutch element comprising a member having acylindrical socket, the walls of said socket being cut away at intervals by axial grooves of the cross-section'of an arc of a circle, and a male clutch element com rising a ball adapted to fit said socket, an a pin through said ball having rounded ends .to fit in said grooves.

21. In a drink an electric motor and its .shaft, of a motor casing, a standard for supporting said motor in fixed relation to a suitable base, a receptacle journaling a rotatable agitator-projecting from its open end, couplin members for connecting the agitator to sai motor shaft, and switch mechanism within said casing and adapted. to be actuated by the placing of said coupling members in operative relation.

22. In a drink mixer, the combination with a stand having a motor at its u per end, a container removably positioned Beneath the motor, an agitator journalled in said container and detachably drive-connected to the motor, a switch embodied in the motor head, switch operating means actuated by the upward movement of the container to driveconnect its agitator to the motor.

23. In a drink mixer, a standard, an electric motor vertically mounted thereon, a container removably ositi'oned beneath the motor. an agitator s aft carried by and journalled in the container and having detachable drive connecting with the motor, a switch for the motor, an actuating member for the switch mounted concentrically of the motor and movable for the closing of the switch by mixer, the combination with the movement of the container in drive-con-.

" operative position beneath for. engaglng 2-1. Adrink mixer comprising a supporting and driving unit including an overhead motor, a standard therefor, a shaft extending downwardly from the motor, a container-agitator unit including an agitator shaft fixedly journalled in a container, a bottom support for the container on the standard constraining the container to a positioning movement consisting in first an upward movement of the container and then a lateral movement -of its bottom, a motor switch actuated by said upward positioning movement, and a separable drive couplin for the motor and the agitator shafts emfiodying a universal joint to permit the driving attachment ofthe shafts when'out of alignment.

25. A drink mixer comprising a standard, a motor vertically mounted thereon, an agitator shaft-driven by the motor, a container within which the agitator is adapted to 0perate, means for supporting the container in the motor comprising a support carried by the standard the lower end of the container, a switch for the motor, a switch operating member, engageableby the upper end of the container when moved upwardly to its standard-supported position, for starting the motor, and spring means acting through the switch operating member to exert a downward resilient pressure upon the container urging it against its support.

26. A drink mixer comprising a standard, a motor vertically mounted thereon, an agitator shaft driven by the motor, a container within which the agitator is adapted to operate, means for supporting the container in operative position beneath the motor comprising a support carried by the standard for engaging the lower end of the container, a switch for the motor, spring means tending to open the switch, vertically moving mechanism engaged by the upper end of the container when moved upwardly to its said supportedposition for closing the switch against the pressure of the spring means, the spring means. when the switch is open, acting through the said mechanism to exert a down ward pressure on the upper end of the container augmenting the force of gravity to hold it more firmly against its support.

27. "A drink mixer comprising a motor driven agitator, a cup-like container in which the agitator operates, a support upon which the container rests, a control switch for the agitator motor, a switch operating member engaged by the container when moved upwardly to close the switch, and spring means urging the switch open and, when the container is operatively positioned, acting through the operatingmember to urge the container downwardly upon its support.

28. A drink mixer comprising a standard, a vertically mounted motor fixed at the upper end of the standard atone side thereof, a

"the motor,

removable cup-shaped container open atits upper end, a supporting stud protruding from the motor side of the standard and urging the bottom of the container adjacent its periphery, an agitator'driven by the motor and extending within the container, a switch for the motor, a vertically reciprocating operating member for closing the switch engaged by the upper end of the container and when moved upwardly to its stud supported position, a retractile spring tending to move the operating member downwardly to an open switch position, said member, under the force of said spring, exerting a downward pressure on the upper end of the container, when in its operative position, urging it upon the supporting stud.

29. A drink mixer comprising a standard, a motor vertically mounted at one end thereof, a cup-shaped container adapted to be posi- Y tioned beneath the motor, an agitatorfor the container driven by the motor, a switch for the motor closed by positioning movement of the container, a retractile spring tending to open the switch, and means for positioning and holding the container on the frame comprising a stud protruding from the standard at the motor side thereof to engage the bottom of the container at the standard side thereof, the standard having integrally spaced vertically extending laterally protruding ribs on the motor side at each side of the stud and engaging the side of the container to limit lateral movement of its lower end, and other means engaging the upper end of the container to limit movement of its upper end, the spring exerting a downward pressure on the upper end of the container urging it upon its supportin stud. 1

30. A drin mixer comprising a container, an agitator for the contents thereof, a motor for driving the agitator, a switch for p a spring tending to open the switch, the switch being adapted for engagement by the upper end of the container and moved to closed position by upward movement of the container, and a support upon which the lower end of the container rests and against which it is urged by the spring.

31. A. drink mixer comprising a cupshaped container, an agitator therefor, a motor for the agitator, a fixed support for the container engaging its lower end adjacent its ousing portion at I and having ,a portion protruding from the hollow frame member for engagement by the upper end of the container, when moved upwardly to its said supported position, to open the switch, a shield member fixed on the frame member guarding the switch operating member from manipulation except by vertical movement from beneath, and a spring urging the operating -member forwardly to open the switch upon removal of the container, the spring acting on the up er end of the container to urge it downwardly upon its support, said shield also acting as a limiting stop for the upper end of the container against lateral movement.

33. A drink mixer comprising a gooseneck standard carrying a vertically mounted motor, at one side thereof, a cup-like container removably positioned beneath the motor and adjacent the side of the standard, a supporting stud extending from the standard for engagin the bottom of the container adjacent the eriphery toward the standard, an agitator s aft driven by the motor and extending downwardly therefrom within the container, a switch for the motor, a vertical switch operating bar mounted for vertical reciprocation 'and having a horizontally bent end portion, through which end portion vertical movement is imparted to the bar by the upper end of the container when the latter is moved upwardly to its studsupported position, and mechanism engaging the upper end of the container, when the latter is moved. u wardly to its studsupported position,. For limiting lateral movement of the up er end of thecontainer away from the stan ard, said mechanism ineluding a shield rigid with the standard and extending between the standard and the axis of the shaft for guarding the horizontal end of the 0 eratin bar against accidental manipulat1on,sai shield constitutinga ositive limit for the upward movement 0 the container should the switch operating mechanism ive beyond a predetermined degree.

34. 5 drink mixer comprising a gooseneck standard carrying a vertical y mounted motor, at one side thereof, a cup-like container removably positioned beneath the motor and adjacent the side of the standard, a su porting stud extending from the standard or engaging the bottom of the container adjacent its periphery toward the standard,

tainergwhen the latter is moved upwardly to its stud-supported osition, for limiting lateral movement of t e upper end of the container away from the standard, said mechanism includin a shield rigid with the standard and exten ing between the standard and the axis of the'shaft for guarding the horizontal end of the operating bar against accidental manipulation.

35. A drink mixer comprising a standardcarrying at its, upper enda vertically mounted motor, at one side of the standard, an

'open top container, a support carried by the standard at the motor side thereof for engaging the lower end of thecontainer to position it beneath the motor, an agitator shaft driven by the motor and adapted to operate within the container, a switch for the motor, a vertically reciprocating ele-' ment for operating the switch actuated by the vertical movement of the upper end of the container when moved upwardly to its said sup orted osition, and means fixed on the stan ard a jacent the u per end of the container and associated wit the operating element for shielding it against accidental vertical manipulation and for maintaining the upper end of the container against lateral displacement.

36. A drink mixer comprising a standard, a vertically mounted motor carried by the upper end thereof, a container adapted to be positioned beneath the motor, a support on the standard for the lower end of the container, an agitator shaft driven by the motor and operating within the container, a switch for the motor closed by u ward movement of the container to its sai supported position, means for opening the switch by the removal of the-container and s ring means, not actin to open the switch ut exerting downwar pressure on the upper end of the container to hold it against its support.

In witness whereof, I hereunto subscribe my name this 29th da of June, 1925.

. STEPHE J. POPLAWSKI. 

